ruby-on-rails - 如何创建角色并为特定角色运行capistrano任务？

这是我在配置/部署中的production.rb

Instance Details
server '198.61.179.237', :web, :app, :db, primary: true
server '198.61.228.160', :file_server

# Rails Environment
set :rails_env, 'production'

并从deploy.rb

namespace :check do
  task :function_1, :roles => :web do
    puts 'function_1'
  end
  task :function_2, :roles => :file_server do
    puts 'filesssss'
  end
end

但是当我尝试做

cap HOSTS=198.61.228.160 production check:function_2
cap HOSTS=198.61.228.160 production check:function_1

cap HOSTS=198.61.179.237 production check:function_2
cap HOSTS=198.61.179.237 production check:function_1

每个人都给出各自的输出。但是根据声明
function_1应该仅适用于:role => :web，类似地function_2应该仅适用于:role => :file_server。

我要去哪里错了？
正确的处理方法是什么？

最佳答案

我相信您想要的是cap HOSTFILTER=198.61.228.160 function_2或cap HOSTFILTER=198.61.179.237 function_1
这是因为HOSTFILTER会检查所有具有功能角色的服务器和您要查找的服务器的交集。 here可以找到一个很好的解释Pete Hodgson

由于手册，我们也可以看到以下内容:

    $ cap -H

       HOSTS
            Execute the tasks against this comma-separated list of hosts.
            Effectively, this makes the host(s) part of every roles.

       HOSTFILTER
            Execute tasks against this comma-separated list of host,
            but only if the host has the proper role for the task.

       HOSTROLEFILTER
            Execute tasks against the hosts in this comma-separated list of roles,
            but only if the host has the proper role for the task.

       ROLES
            Execute tasks against this comma-separated list of roles.  Hosts which
            do not have the right roles will be skipped.

hostFilter

ruby-on-rails - 如何创建角色并为特定角色运行capistrano任务？